I am getting some new tubes for my amp, and I want to do a 24-hour burn in. How?

+1 @melvinjames 

One of the interesting things about this hobby for me is trying to pay attention to different stages of break-in.

People who I know who have been in this hobby for a long time will talk about the various changes that tubes and cables can go through before they reach a level of maturity.

I think that kind of self education and how things sound is a wonderful part of the hobby and it serves well for down the road because one becomes more sophisticated about what they're hearing and what perhaps is causing it.

OP, just wondering why you want to burn in for 24 hours? What makes you want to do that? Obviously, it's not strictly necessary to do this, and it's ever so easy for people to tell you that, but I'm more interested in what you read or what you're investigating that makes you ask the question.

The way I've done burn in is to put on a track of pink noise and put on repeat, medium volume. I didn't go for 24 hours straight. I just kept a list -- day, number of hours, etc. Then each day, or overnight, I would put them on for, say 8 or more hours. Adds up quickly. My amp does not have a "standby" but I think the point is that it should be playing something, at a modest volume, through speakers.

OP, gotcha. It does change the sound, and (again) it's interesting to hear the changes.

I'm amazed at how many people are telling you to just plug it in -- as if there are not a million threads about tweaks, techniques, etc. You're asking a reasonable question that many have asked before (in one form or another) and you're getting your head patted as if you were over-worrying. This is a hobby and we're on a hobbyists' forum and you're asking a hobbyists' question.